There were 3 drug docking programs used for the fightAIDS@home project: Autodock, VINA, and BEDAM. The first 2 of these were developed in-house at Scripps, while BEDAM was developed elsewhere. I gather that each gave different results, and in general they gave too many false positives. BEDAM is very CPU-intensive, and was only used for a limited selection of the most promising drug leads from the other 2 programs.

Any or all of these could have been used for the earlier phases of SCC, but VINA was the chosen one, probably because it ran fastest.
VINA could also have been chosen for Open Pandemics (OPN), but the current, upgraded, verson of Autodock (Autodock4) is being used instead. The upgrade has enabled the program to model covalent bonding, which could not be done by the original Autodock or presumably by VINA. Additionally, a GPU version of Autodock is now in use and this overcomes the disadvantage of Autodock running more slowly than VINA, by a vast margin.

Has Autodock4 for CPU and/or GPU been trialled for SCC, and are there any plans to do so?

There is a minor error in your news / announcement:

It clearly should be years, not hours.
48 000 hrs is a puny amount of calculations - just little above 5 years of CPU time ( 48000/24/365 = 5,47y)

When the project was active on WCG, it was running at pace of several dozen years of CPU time in just one/each calendar day! It is an equivalent of several hundred thousand of CPU cores running 24/7.

[I can’t speak for Cyclops but, I have observed SCC WU’s slowly and quietly released for processing. And ZERO http issues!